At just 1,049 feet (320 m) high, Roseberry Topping may not be the biggest hill you'll ever see, but it will certainly be one of the most distinctive. Its shape, caused by the combination of a geological fault and a mining collapse in 1912 has made the hill the most beloved landmark in the Tees Valley area. With its half-cone summit and jagged cliff, some say it reminds them of the Matterhorn in Switzerland.